Slow wire cutting machine tools are usually divided into two categories based on the operating speed of the electrode wire: one is slow wire cutting (also known as low-speed wire cutting EDM machine tools), where the electrode wire moves in a low-speed unidirectional direction, with a wire speed generally below 0.2mm/s, an accuracy of 0.001mm level, and a surface quality close to the grinding level. The electrode wire is no longer used after discharge, and it works smoothly, uniformly, with little shaking and good processing quality. Moreover, advanced power technology is adopted to achieve high-speed machining, with a high productivity of up to 350mm2/min. Due to the continuous supply of wire electrodes during the movement of the wire cutting machine, even if the wire electrodes are lost, they can be continuously replenished, thus improving the machining accuracy of the parts. The surface roughness of workpieces processed by slow wire cutting machines can usually reach Ra=0.12 μ m or above. Moreover, the roundness error, linear error, and dimensional error of slow wire cutting machines are much better than those of fast wire cutting machines. Therefore, when processing high-precision parts, slow wire cutting machines have been widely used.